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Verified answer
(3x-5)²= (3x-5)(3x-5)
= 9x²-15x-15x+25
= 9x²-30x+25
= (3x - 5) (3x - 5)
= 9x^2 - 15x - 15x + 25
= 9x^2 - 30x + 25